Biomechanical analysis of grip strength in upper limb rehabilitation

This research is based on biomechanics as a science that involves concepts of engineering, mechanics, physic, anatomy, physiology, and many others, to study the human body with the desire to solve certain problems that may affect the performance of an individual in their work or personal level. This work is an investigative process in these areas of scientific and applied disciplines, in which the attention is focused on the hand as a valuable tool for the occupational performance of the human being, since through it is possible to touch, move, grasp, or manipulate objects. Injuries to this limb may be due to various causes, which require complex surgeries and long periods of rehabilitation to be reversed. This research highlights the importance of certain physical concepts that must be understood by the rehabilitation expert in order not to affect the surgery and thus guarantee the maximum functionality of the patient at the end of the recovery cycle.

The Application of Jigsaw Cooperative Learning Model through Lesson Study in the Grade X of State Vocational High School/SMK in Sukoharjo

<p>Cooperative learning model Jigsaw which collaborated with lesson study is one of the strategies used to stimulate the students’ participation in the learning process, especially in solving and explaining each answer of problems given by the teacher so that the learning process is not only centered on the teacher but also the students. The purposes of this research are to: (1) determine the application of the appropriate steps in order to increase students’ participation and students’ learning outcome through Jigsaw cooperative learning model with lesson study; (2) to know the improvement of students’ participation and students’ learning outcome for the Engineering Mechanics subject of grade X of state SMK in Sukoharjo through the implementation of Jigsaw cooperative learning model with lesson study. This research is a classroom action research which conducted in three cycles.</p><p>The results showed that: (1) there was appropriate application of steps in improving the students’ participation and students’ learning outcome in accordance with the Jigsaw cooperative learning model through lesson study; (2) students became more active in participating in grade, such as asking, giving opinion, and discussion. The percentage of completeness of students’ learning outcome in the cognitive area of pre-cycle was 30%, 64.71% in the first cycle, 79.41% in the second cycle, and 82.35% in the third cycle. Then, in term of students’ learning outcome in the affective area, most students were predicated Very Good and Good. Next, the percentage of completeness student learning outcome in the pre-cycle of psychomotor was 26.67%, 61.76% in the first cycle, 79.41% in the second cycle, and 85.29% in the third cycle. From this analysis, it can be concluded that the implementation of Jigsaw cooperative model through lesson study with appropriate steps has succesfully increased the students’ participation and students’ learning outcome of grade X of state SMK in Sukoharjo on the subjects of Engineering Mechanics.</p>

Fatigue-Life Assessment

This article offers an overview of fatigue fundamentals, common fatigue terminology, and examples of damage morphology. It presents a summary of relevant engineering mechanics, cyclic plasticity principles, and perspective on the modern design by analysis (DBA) techniques. The article reviews fatigue assessment methods incorporated in international design and post construction codes and standards, with special emphasis on evaluating welds. Specifically, the stress-life approach, the strain-life approach, and the fracture mechanics (crack growth) approach are described. An overview of high-cycle welded fatigue methods, cycle-counting techniques, and a discussion on ratcheting are also offered. A historical synopsis of fatigue technology advancements and commentary on component design and fabrication strategies to mitigate fatigue damage and improve damage tolerance are provided. Finally, the article presents practical fatigue assessment case studies of in-service equipment (pressure vessels) that employ DBA methods.

Reform Exploration for Safety Course System of Oil and Gas Storage and Transportation Facilities

In recent years, the safety of oil and gas storage and transportation facilities has been paid more attention by the state and enterprises due to frequent accidents. The oil and gas storage and transportation facilities safety courses in China University of Petroleum (Beijing) includes “Engineering mechanics”, “Strength design of pipelines and tanks” and “Safety and integrity management of oil and gas storage and transportation facilities”. The three courses lack relevance and the teaching mode is too rigid, resulting in students losing their initiative in learning. If students can’t use the knowledge flexibly, it will affect the achievement of the objectives of the training program. Therefore, oil and gas storage and transportation facilities safety courses are reformed, training plans are adjusted and teaching methods are improved. The practice shows that the reform enriches the teaching content, improves the teaching quality, stimulates classroom activity and gets a good evaluation of students. The reform of safety courses has a certain significance for cultivating compound talents who have the ability to solve practical problems in engineering.